diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00.h | 10 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00pci.c | 77 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00queue.c | 71 | ||||
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00usb.c | 21 |
4 files changed, 113 insertions, 66 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index 8d45235ecc3..08e8b0a005a 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -899,10 +899,16 @@ static inline u16 get_duration_res(const unsigned int size, const u8 rate) } /** - * rt2x00queue_alloc_rxskb - allocate a skb for RX purposes. + * rt2x00queue_alloc_skb - allocate a skb. * @queue: The queue for which the skb will be applicable. */ -struct sk_buff *rt2x00queue_alloc_rxskb(struct data_queue *queue); +struct sk_buff *rt2x00queue_alloc_skb(struct data_queue *queue); + +/** + * rt2x00queue_free_skb - free a skb + * @skb: The skb to free. + */ +void rt2x00queue_free_skb(struct sk_buff *skb); /** * rt2x00queue_create_tx_descriptor - Create TX descriptor from mac80211 input diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c index d6138389a5d..e7e3a459b66 100644 --- a/drivers/net/wireless/rt2x00/rt2x00pci.c +++ b/drivers/net/wireless/rt2x00/rt2x00pci.c @@ -74,13 +74,59 @@ EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data); /* * TX/RX data handlers. */ +static void rt2x00pci_rxdone_entry(struct rt2x00_dev *rt2x00dev, + struct queue_entry *entry) +{ + struct sk_buff *skb; + struct skb_frame_desc *skbdesc; + struct rxdone_entry_desc rxdesc; + struct queue_entry_priv_pci *entry_priv = entry->priv_data; + + /* + * Allocate a new sk_buffer. If no new buffer available, drop the + * received frame and reuse the existing buffer. + */ + skb = rt2x00queue_alloc_skb(entry->queue); + if (!skb) + return; + + /* + * Extract the RXD details. + */ + memset(&rxdesc, 0, sizeof(rxdesc)); + rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); + + /* + * Copy the received data to the entries' skb. + */ + memcpy(entry->skb->data, entry_priv->data, rxdesc.size); + skb_trim(entry->skb, rxdesc.size); + + /* + * Fill in skb descriptor + */ + skbdesc = get_skb_frame_desc(entry->skb); + memset(skbdesc, 0, sizeof(*skbdesc)); + skbdesc->desc = entry_priv->desc; + skbdesc->desc_len = entry->queue->desc_size; + skbdesc->entry = entry; + + /* + * Send the frame to rt2x00lib for further processing. + */ + rt2x00lib_rxdone(entry, &rxdesc); + + /* + * Replace the entries' skb with the newly allocated one. + */ + entry->skb = skb; +} + void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue = rt2x00dev->rx; struct queue_entry *entry; struct queue_entry_priv_pci *entry_priv; - struct skb_frame_desc *skbdesc; - struct rxdone_entry_desc rxdesc; u32 word; while (1) { @@ -91,32 +137,7 @@ void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev) if (rt2x00_get_field32(word, RXD_ENTRY_OWNER_NIC)) break; - memset(&rxdesc, 0, sizeof(rxdesc)); - rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc); - - /* - * Allocate the sk_buffer and copy all data into it. - */ - entry->skb = rt2x00queue_alloc_rxskb(queue); - if (!entry->skb) - return; - - memcpy(entry->skb->data, entry_priv->data, rxdesc.size); - skb_trim(entry->skb, rxdesc.size); - - /* - * Fill in skb descriptor - */ - skbdesc = get_skb_frame_desc(entry->skb); - memset(skbdesc, 0, sizeof(*skbdesc)); - skbdesc->desc = entry_priv->desc; - skbdesc->desc_len = queue->desc_size; - skbdesc->entry = entry; - - /* - * Send the frame to rt2x00lib for further processing. - */ - rt2x00lib_rxdone(entry, &rxdesc); + rt2x00pci_rxdone_entry(rt2x00dev, entry); if (test_bit(DEVICE_ENABLED_RADIO, &queue->rt2x00dev->flags)) { rt2x00_set_field32(&word, RXD_ENTRY_OWNER_NIC, 1); diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 15660b588a1..278f1a1ac92 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -29,7 +29,7 @@ #include "rt2x00.h" #include "rt2x00lib.h" -struct sk_buff *rt2x00queue_alloc_rxskb(struct data_queue *queue) +struct sk_buff *rt2x00queue_alloc_skb(struct data_queue *queue) { struct sk_buff *skb; unsigned int frame_size; @@ -42,17 +42,10 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct data_queue *queue) frame_size = queue->data_size + queue->desc_size; /* - * For the allocation we should keep a few things in mind: - * 1) 4byte alignment of 802.11 payload - * - * For (1) we need at most 4 bytes to guarentee the correct - * alignment. We are going to optimize the fact that the chance - * that the 802.11 header_size % 4 == 2 is much bigger then - * anything else. However since we need to move the frame up - * to 3 bytes to the front, which means we need to preallocate - * 6 bytes. + * Reserve a few bytes extra headroom to allow drivers some moving + * space (e.g. for alignment), while keeping the skb aligned. */ - reserved_size = 6; + reserved_size = 8; /* * Allocate skbuffer. @@ -66,7 +59,13 @@ struct sk_buff *rt2x00queue_alloc_rxskb(struct data_queue *queue) return skb; } -EXPORT_SYMBOL_GPL(rt2x00queue_alloc_rxskb); +EXPORT_SYMBOL_GPL(rt2x00queue_alloc_skb); + +void rt2x00queue_free_skb(struct sk_buff *skb) +{ + dev_kfree_skb_any(skb); +} +EXPORT_SYMBOL_GPL(rt2x00queue_free_skb); void rt2x00queue_create_tx_descriptor(struct queue_entry *entry, struct txentry_desc *txdesc) @@ -422,12 +421,45 @@ static int rt2x00queue_alloc_entries(struct data_queue *queue, return 0; } +static void rt2x00queue_free_skbs(struct data_queue *queue) +{ + unsigned int i; + + if (!queue->entries) + return; + + for (i = 0; i < queue->limit; i++) { + if (queue->entries[i].skb) + rt2x00queue_free_skb(queue->entries[i].skb); + } +} + +static int rt2x00queue_alloc_skbs(struct data_queue *queue) +{ + unsigned int i; + struct sk_buff *skb; + + for (i = 0; i < queue->limit; i++) { + skb = rt2x00queue_alloc_skb(queue); + if (!skb) + goto exit; + + queue->entries[i].skb = skb; + } + + return 0; + +exit: + rt2x00queue_free_skbs(queue); + + return -ENOMEM; +} + int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue; int status; - status = rt2x00queue_alloc_entries(rt2x00dev->rx, rt2x00dev->ops->rx); if (status) goto exit; @@ -442,11 +474,14 @@ int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev) if (status) goto exit; - if (!test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags)) - return 0; + if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags)) { + status = rt2x00queue_alloc_entries(&rt2x00dev->bcn[1], + rt2x00dev->ops->atim); + if (status) + goto exit; + } - status = rt2x00queue_alloc_entries(&rt2x00dev->bcn[1], - rt2x00dev->ops->atim); + status = rt2x00queue_alloc_skbs(rt2x00dev->rx); if (status) goto exit; @@ -464,6 +499,8 @@ void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue; + rt2x00queue_free_skbs(rt2x00dev->rx); + queue_for_each(rt2x00dev, queue) { kfree(queue->entries); queue->entries = NULL; diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index f91901ffda5..29dba86c8cf 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -300,7 +300,7 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb) * If allocation fails, we should drop the current frame * so we can recycle the existing sk buffer for the new frame. */ - skb = rt2x00queue_alloc_rxskb(entry->queue); + skb = rt2x00queue_alloc_skb(entry->queue); if (!skb) goto skip_entry; @@ -434,8 +434,6 @@ static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, entry_priv = queue->entries[i].priv_data; usb_kill_urb(entry_priv->urb); usb_free_urb(entry_priv->urb); - if (queue->entries[i].skb) - kfree_skb(queue->entries[i].skb); } /* @@ -457,10 +455,7 @@ static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev, int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) { struct data_queue *queue; - struct sk_buff *skb; - unsigned int entry_size; - unsigned int i; - int uninitialized_var(status); + int status; /* * Allocate DMA @@ -471,18 +466,6 @@ int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) goto exit; } - /* - * For the RX queue, skb's should be allocated. - */ - entry_size = rt2x00dev->rx->data_size + rt2x00dev->rx->desc_size; - for (i = 0; i < rt2x00dev->rx->limit; i++) { - skb = rt2x00queue_alloc_rxskb(rt2x00dev->rx); - if (!skb) - goto exit; - - rt2x00dev->rx->entries[i].skb = skb; - } - return 0; exit: |